package com.hongfasoft.wx.service;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;

import com.hongfasoft.util.SignUtil;
import com.hongfasoft.util.TokenAccessManager;

/**
 * 
 * 类描述：核心请求处理类
 * 
 * @author 王涛
 * @date 2014年12月7日
 */
public class CoreServlet extends HttpServlet
{
	private static Logger log = Logger.getLogger(CoreServlet.class);

	private static final long serialVersionUID = 4440739483644821986L;

	/**
	 * 确认请求来自微信服务器
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
	{
		// 微信加密签名
		String signature = request.getParameter("signature");
		// 时间戳
		String timestamp = request.getParameter("timestamp");
		// 随机数
		String nonce = request.getParameter("nonce");
		// 随机字符串
		String echostr = request.getParameter("echostr");

		PrintWriter out = response.getWriter();
		try
		{
			// 通过检验signature对请求进行校验，若校验成功则原样返回echostr，表示接入成功，否则接入失败
			if (SignUtil.checkSignature(signature, timestamp, nonce))
			{
				out.print(echostr);
			}
			out.flush();
			log.info(echostr + "微信绑定成功");
			out.close();
			out = null;
		} catch (Exception e)
		{
			log.error("绑定失败", e);
			e.printStackTrace();
		} finally
		{
			out = null;
		}
	}

	/**
	 * 处理微信服务器发来的消息
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
	{
		// TODO 消息的接收、处理、响应
		// 将请求、响应的编码均设置为UTF-8（防止中文乱码）
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");

//		System.out.println(request.getParameterMap());
		// 调用核心业务类接收消息、处理消息
		String respMessage = CoreService.processRequest(request);

		// 响应消息
		PrintWriter out = response.getWriter();
		out.print(respMessage);
		out.flush();
		out.close();
		out = null;
	}
	
	public void init()
	{
		TokenAccessManager tam = new TokenAccessManager();
		tam.startup();
	}
}
